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公开(公告)号：US20240329551A1
公开(公告)日：2024-10-03
申请号：US18613681
申请日：2024-03-22
发明人： KENTARO KAMAE , KENTA MITSUIKI , NOBUHIRO YOSHIDA , MAKI IMURA , KOHEI YOSHIYAMA , YUU NISHIMURA , KAZUNARI OOYAMA , NOBUYOSHI SUGAHARA , YUYA CHIMOTO , TAKAHO SHIBATA
CPC分类号： G03G9/08724 , G03G9/08755 , G03G9/1075
摘要： A toner is provided, which has a toner particle that contains a binder resin which contains an amorphous resin A and a crystalline polyester C, wherein the amorphous resin A and the crystalline polyester C each has a structure of a specific straight-chain aliphatic polyhydric alcohol, the amorphous resin A has a structure in which a polyester is crosslinked with a vinyl polymer, and the melting point of the crystalline polyester C and the weight-average molecular weight of the amorphous resin A lie within respective specific ranges.
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公开(公告)号：US20230341790A1
公开(公告)日：2023-10-26
申请号：US18182548
申请日：2023-03-13
发明人： KENTA MITSUIKI , HISASUKE KAJIHARA , MAKI IMURA , NOBUHIRO YOSHIDA , KOHEI YOSHIYAMA , KENTARO KAMAE , YUU NISHIMURA , KAZUNARI OOYAMA , NOBUYOSHI SUGAHARA , YUYA CHIMOTO , TAKAHO SHIBATA
CPC分类号： G03G9/08755 , G03G9/107
摘要： A toner includes a toner particle containing a binder resin containing a crystalline polyester. In differential scanning calorimetry (DSC), the toner is heated to 180° C. at a rate of 10° C./min, then cooled to 25° C. at a rate of 10° C./min and successively from 25° C. to 15° C. at a rate of 3° C./min, and heated again to 180° C. at a rate of 10° C./min. As a result, an exothermic amount P1 when the toner is cooled from 80° C. to 40° C. is 1.00 J/g or less, an exothermic amount P2 when the toner is cooled from 25° C. to 15° C. is 0.10 J/g or more, and when a sum of endothermic amounts P3 (J/g) when the toner is heated again from 40° C. to 180° C. and a sum of exothermic amounts P4 (J/g) when the toner is cooled from 180° C. to 40° C. satisfies 2.0 ≤ P3-P4 ≤ 10.0.
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公开(公告)号：US20230305415A1
公开(公告)日：2023-09-28
申请号：US18181105
申请日：2023-03-09
发明人： NOBUHIRO YOSHIDA , KOHEI YOSHIYAMA , MAKI IMURA , KENTA MITSUIKI , KENTARO KAMAE , YUU NISHIMURA , KAZUNARI OOYAMA , NOBUYOSHI SUGAHARA , HISASUKE KAJIHARA , YUYA CHIMOTO , TAKAHO SHIBATA
CPC分类号： G03G9/08755 , G03G9/081
摘要： The present invention provides a toner including a toner particle containing a binder resin and a release agent. The binder resin contains an amorphous resin and a crystalline resin, and a content of the crystalline resin is 1.0% to 20.0% by mass based on a mass of the binder resin. In a cross-section of the toner particle observed by scanning transmission electron microscopy, (i) there exist a matrix A of the amorphous resin and domains A of the release agent dispersed in the matrix A, (ii) the domains A each include a matrix B of the release agent and domains B of the crystalline resin dispersed in the matrix B, and (iii) the domains A are each covered with the crystalline resin and an average coverage of the domains A by the crystalline resin is 70% or more.
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公开(公告)号：US20240337960A1
公开(公告)日：2024-10-10
申请号：US18616695
申请日：2024-03-26
发明人： YUU NISHIMURA , KENTARO KAMAE , KENTA MITSUIKI , NOBUHIRO YOSHIDA , MAKI IMURA , KOHEI YOSHIYAMA , KAZUNARI OOYAMA , NOBUYOSHI SUGAHARA , YUYA CHIMOTO , TAKAHO SHIBATA
CPC分类号： G03G9/08755 , G03G9/107
摘要： A toner comprising: a toner particle comprising a binder resin, a release agent, and a graft polymer (A), wherein the binder resin comprises an amorphous polyester, the graft polymer (A) has two or more exothermic peaks measured by differential scanning calorimetric measurement, the release agent has at least one exothermic peak, and when, among exothermic peaks of the graft polymer (A), a peak temperature of a highest temperature-side exothermic peak is indicated by TMax (° C.), a peak temperature of a lowest temperature-side exothermic peak is indicated by TMin (° C.), and, among exothermic peaks of the release agent, a peak temperature of a maximum exothermic peak is indicated by TWax (° C.), TMax, TMin and TWax satisfy relationships of formulae (1) and (2) below:
5.
≤
T
Max
-
T
Min
≤
20.
,
and
(
1
)
10.
≤
T
Wax
-
T
Max
≤
40.
.
(
2
)-
公开(公告)号：US20240231249A1
公开(公告)日：2024-07-11
申请号：US18333853
申请日：2023-06-13
发明人： MAKI IMURA , KOHEI YOSHIYAMA , NOBUHIRO YOSHIDA , KENTA MITSUIKI , KENTARO KAMAE , YUU NISHIMURA , KAZUNARI OOYAMA , NOBUYOSHI SUGAHARA , YUYA CHIMOTO , TAKAHO SHIBATA
IPC分类号： G03G9/087
CPC分类号： G03G9/08755
摘要： Provided is a toner containing a binder resin, wherein the binder resin contains an amorphous polyester and a crystalline polyester, and wherein, when the toner is used as a sample in differential scanning calorimetry (DSC) involving a first process of increasing a temperature from 20° C. to 180° C., a second process of decreasing the temperature from 180° C. to 20° C., and a third process of increasing the temperature from 20° C. to 180° C., DSC curves have a specific endothermic peak or exothermic peak derived from the crystalline polyester, and when a temperature of a maximum peak top of the endothermic peak in the DSC curve obtained through the first process is represented by T1 (° C.), and a temperature of a maximum peak top of the endothermic peak in the third DSC curve is represented by T2 (° C.), the Tl and the T2 satisfy the following expression (1).
-
1.
≤
T
2
-
T
1
(
1
)
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-
-
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